The United Nations is backing a mass vaccination campaign under way in northern Cameroon, where a new outbreak of yellow fever has killed at least seven people.
The vaccination campaign, which began late last month in eight districts, aims to eventually protect more than 1.2 million people considered at high risk of contracting yellow fever, which has no cure and is spread by mosquitoes.
The UN World Health Organization (WHO) reported on Friday that the vaccinations are aimed at areas not covered in a previous campaign in 2009 because they have no history of yellow fever outbreaks or circulation of the yellow fever virus.
Since October last year at least 23 cases have been recorded in Cameroon, with tests confirming the illness was yellow fever rather than dengue fever or West Nile virus.
WHO said it is working with Government health officials in Cameroon to assess the extent of the outbreak and confirm the cases.
The UN Central Emergency Response Fund (CERF), the International Coordinating Group on Yellow Fever Provision (YF-ICG) - which includes WHO and the UN Children's Fund (UNICEF) - and the public-private partnership known as the GAVI Alliance are funding the vaccination campaign..